Daily Sunspot Evaluation
Observation Sheet Thursday, 23 April 1970
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 5
- Number of spots (f)
- 37
- Relative number (R)
- 87
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700423.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 20 | 07E | 221 | |||
| 2 | A – 4 | 25 | 18E | 210 | |||
| 3 | C – 16 | -9 | 04W | 232 | |||
| 4 | G – 3 | -8 | 49W | 277 | |||
| 5 | D – 11 | 2 | 51W | 279 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.